loading=lazy not removed from images when stepping backwards

[dhoulder]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/p/sandbox/swiper-lazy-load-images-forked-i41wik?file=%2Findex.html%3A60%2C47

Bug description

Preconditions:

• Initial slide is somewhere in the middle of the set of slides
• lazyPreloadPrevNext > 0

Stepping forwards through the slides from the initial slide clears loading=lazy from the images ahead of the current slide.

Stepping backwards through the slides from the initial slide does not clear loading=lazy from images in or before the current slide

May be a problem here

swiper/src/shared/process-lazy-preloader.js

Line 40 in a8fc1df

if (i !== activeIndex && i > slideIndexLastInView) unlazy(swiper, i);

Expected Behavior

Images in or prior to the current slide should have loading=lazy removed

Actual Behavior

Images in or prior to the current slide don't have loading=lazy removed

Swiper version

9.3.2

Platform/Target and Browser Versions

Ubuntu 22.04, , Mozilla Firefox 113.0.1, Chromium 113.0.5672.63

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Make sure this is a Swiper issue and not a framework-specific issue

Would you like to open a PR for this bug?

• I'm willing to open a PR